I think you need to hold to your first choice. I made a quilt and posted it on here and it got lots of compliments, plus everyone who sees it loves it- or at least that's what they tell me. But while I was making it one of my friends kept telling me it wasn't going to look right- I had too many different colors, etc. Then, when it was finished, she loved it. So other people aren't seeing what you are seeing in your head. Only you can see that.
That said, if it isn't fun anymore, just put it away and start a new project. Quilting isn't supposed to be work or unpleasant- it's supposed to be fun and bring joy. (That's my opinion anyway.)
Oh! And I love black in a quilt! LOVE IT!!